Hinge knuckle for folding door assembly



FIG. 1 is an isometric view of a front portion of a hinge knuckle for folding door assembly showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the figures represent portions of the hinge knuckle for folding door assembly that form no part of the claimed design. 

CLAIM The ornamental design for a hinge knuckle for folding door assembly, as shown and described. 